Doxycycline-Induced Antinuclear Antibody and Antineutrophil Cytoplasmic Antibody Associated Vasculitis: A Case Report and Literature Review

Table 1

Antinuclear antibodies (ANA), perinuclear-antineutrophil cytoplasmic antibodies (pANCA), and anti-myeloperoxidase antibody (anti-MPO AB).

	Reference range	6/18/15	7/1/15	11/23/15	12/26/15
ANA dilution	Normal < 40 titer	40	2,560	1,280	640
pANCA	Normal titer negative		pANCA positive	pANCA positive	Negative
Anti-MPO AB	Normal < 20.1 units		69.3 units	5.4 units
CRP	Normal 0–5 mg/L		235 mg/L	10 mg/L